When it comes to unlocking a doorknob that has a hole on the side, the solution is simple. Using something small like a paper clip or even a coat hanger, you can insert the tool and move it until it catches. The locking mechanism should release, and you will be able to turn the doorknob once again.
Can you unlock a door by taking the handle off?
Option 5: Take off the door knob
As long as the deadbolt on your door isn’t locked, you should be able to gain entry by removing the doorknob. Most doorknobs have concealed connections or mounting screws, but if you look closely you’ll see a pin-sized hole or slot below or to the side of the doorknob.